Lasting and tacking machine.



PATENTED NOV 20, 1906.

H. WALTHER. LASTING AND TAGKING MACHINE.

APPLICATION FILED FEB. 26, 1902.

ms mamas pzrsns 00., wnshmaron, n. c.

UNITED STATES PATENT OFFICE.

HEINRICH WALTHER, OF OFFENBACH-ON-THE-MAIN, GERMANY, ASSIGNOR TO NOLLESCHE WERKE ACT-(HES, OF WVEISSENFELS, GERMANY.

Specification of Letters Patent.

Patented Nov. 20, 1906.

Application filed February 26, 1902. Serial No. 95,665.

This guiding of the forknecessitates a special T0 at whom, it may concern:

Be it known that I, HEINRIOH WALTHER, residing at Offenbach-on-the-Vfain, Germany, have invented a certain new and useful Im provement in Lasting and Tacking Machines, of which the following is a specification.

In lasting and tacking machines the pincers which draw the leather tightly over the last are moved to and fro, so that each time the shoe is moved forward the leather is gripped and is drawn over the last. As this to-and-fro movement is not suflicient in certain cases to draw the leather sufficiently tight without forming folds, the pincers are enabled to move laterally in addition to the to-and-fro movement, and the lateral movement is imparted to the pincers by the workman, for example, by the pressure of his knee. In this connection it has been noticed that the leather is frequently not only skinned but torn, especially in its upper black layer, which in almost all cases is due not to the quality of the leather, but to insufiicient guiding of the pincers during the lateral movement. Consequently according to this invention the pincers in such lateral movement are so guided that they must move in a determined'L. a, in an arcshapedpath. The lateral movement is in this case not only limited at its extreme end, but at the same time security and uniformity of the movement are insured without a pull or shock to which the leather is subjected in other cases.

In order to guide the pincers in the hereinbefore-described manner, they are connected to the lever operated by the workman by means of a fork which is adapted to oscillate about a fixed point and transmits the movements effected by the operator to the pincers in such a way that the pincers oscillate in the hereinbefore-described path. The pincers are located within this fork and are constantly pressed into the before-mentioned path by springpressure.

For the purpose of enabling the pincers always to return automatically into the mid- (lle position from the lateral positions there is arranged opposite to the oscillating fork a second fork, which is stationary and into the opening in which the pincers spring automatically from the side position into the middle position. This stationary fork can be adjusted to suit various sizes of shoes.

suspension of the shank of the pincers at its upper and middle parts. At its upper part it is suspended by means of a ball in the frame of the machine, and at the middle part it is connected by a suitable joint to the carriage, which imparts to it the requisite forward and backward movements in relation to the lasts.

The invention is shown in the drawings, in

which Figure 1 is a side elevation. Fig. 2'is a section on the line A B of Fig. 1. Fig. 3 is a front elevation. Fig. 4 is a detail section on the line C D of Fig. 2.

The pincers comprise, as is customary, two jaws 1 and 2 of which the latter is guided up and down in the former, so as to release and hold the leather. The jaw 2 of the pincers is operated relatively to the jaw 1 by means of the cam 3, which is mounted on a suitablydriven shaft journaled in the carriage F. For this purpose the shank of aw 2 is provided with a sleeve 4, provided with a roller 4, which is engaged and forced downward at intervals by any suitable cam projection 3, connected with the cam 3 and adapted to wipe over the roller 4, so as to push the jaw 2 downward. A spring 5 surrounds a portion of the jaw 1 and normally holds both jaws 1 and 2 in raised position. A spring 6, bearing upward against the sleeve 4 and suitablysupported at its lower end, holds the jaw 2 normally in raised position with relation to the jaw 1. Furthermore, the jaws of the pincers receive a to-and-fro movement by means of the rod 7 in order to draw the leather tight. The rod 7 may be pushed normally to the left in Fig. 1 in any suitable manner, either manually or by means of a suitable coilspring, (not shown,) as will be understood by those skilled in the art. In addition to this movement the pincers are moved laterally at right angles to the direction in which the pincers are guided by the rod 7. As has been previously mentioned, the leather frequently tears during this lateral movement.

An arc-shaped guide 8 is therefore provided on the carriage F, in which the projection 9 of the pincer-jaw 1 is guided in a positive manner by spring-pressure which is supplied from the carriage to the rod 7, it being understood that the spring-pressure or the like applied to the rod 7 causes the jawsl and 2 to be forced normally to the left in Fig. 1, so that the jaw 1 contacts with the guide 8. In order to impart this lateral movement, as desired, to the rod, an arrangement of levers 10, 11, 12, and 13 is operated in a known manner by the knee of the workman. The rod 13 of this system engages with a fork 15, which is pivoted at 14 to the carriage and surrounds the jaw 1 of the pincers. When the lever 12 is pressed to one side by the knee of the workman, the jaw 1 of the pincers is guided in the arc-shaped guide, so that one of the springs 16 and 17 is compressed, the fork 15 being automatically returned again to the middle position when the pressure is released. In order to insure that the fork 15 assumes the middle position, there is arranged opposite to fork 15 a stationary fork 18, into which the jaw of the pincers enters automatically under the action of the springs 16 and 17 and the rod 7, which, as previously described, is forced normally to the left in Fig. 1 in any suitable manner to push the jaw 1 into the fork 18. The fork 18 can be adjusted through the medium of pin and slot 19, according to the size of the shoe.

In order to enable the upper jaw of the pincers to follow the path necessitated by the arc-shaped guide 8, it is connected at its upper part by means of a ball-joint 20 and at its middle part by a suitable universal joint with. the rod 7 or with its carriage. The universal joint which it is preferred to employ comprises a sleeve 21, loosely surrounding the jaws 1 and 2 and serving as the support for the lower end of the spring 6, which normally presses the jaw 2 upward. The sleeve 21 is provided with two oppositely-extending pins or trunnions 2 1, which extend loosely through suitable perforations in the ends of a wide fork 7, mounted on the end of the rod 7, as

shown in Figs. 1 and 3. ciently wide to permit the necessary to-andfro or side movements of the jaws 1 and 2. By reason of the fact that the sleeve 21 loosely surrounds the jaws 1 and 2 said jaws canslide up and down in said sleeeve, and at the same time the spring or other pressure applied to rod 7 forces the jaws 1. and 2 normally toward the fork 18, as previously described.

Having now descrlbed my invention, what I claim as new, and desire to secure by Let ters Patent, is-

1. In lasting and tacklng machines, the combination of pincers having movable arms, and an arc-shaped guide located in a plane at substantially a right angle with the line of movement of said arms, through which guide said arms pass.

2. In lasting and packing machines, the combination of laterally movable pincers which are movable up and down, and a horizontal arc-shaped guide, with a rod which effects the lateral movement of the pincers and a fork which connects the rod with the pincers.

3. In lasting and tacking machines, the combination. of pincers which are movable up and down, an arc-shaped guide, a rod for moving the pincers laterally, a fork operated by the rod 13 for moving the pincers laterally and a stationary fork which is arranged opposite to the said first-named fork.

4. In lasting and tacking machines, the combination of pincers which are movable up and down, an arc-shaped guide, a rod for moving the pincers laterally, a fork operated by the rod 13 for moving the pincers laterally and a normally stationary adjustable fork which is arranged opposite to the said firstnamed fork.

5. In lasting and tacking machines, the combination of a pincer-jaw having a balljoint at one end, a second jaw slidable on the first-mentioned jaw, means for moving said jaws laterally, means for moving said jaws to and fro, and a guide for said jaws.

Signed this 25th day of January, 1902, at

HEINRICH WALTHER.

Leipsic.

Witnesses RUDOLPH FRioKE, B. H. WARNER, Jr. 

